<template>
  <div class="article-container">
    <!-- {{$route.params.artId}} -->
    <!-- router.push({name:'/artId',params:{art_id}}) -->
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      left-arrow
      title="黑马头条"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div v-if="isLoading" class="loading-wrap">
        <van-loading
          color="#3296fa"
          vertical
        >加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="articles.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title" v-html="articles.title"></h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            src="https://img.yzcdn.cn/vant/cat.jpeg"
          />
          <div slot="title" class="user-name">{{articles.aut_name}}</div>
          <div slot="label" class="publish-date">{{articles.pubdate | relativeTime}}</div>
          <!-- <van-button
            class="follow-btn"
            type="info"
            color="#3296fa"
            round
            size="small"
            icon="plus"
            v-if="!articles.is_followed"
            @click="onFollowed"
            :loading="isFollowLoading"
          >关注</van-button>
          <van-button
            class="follow-btn"
            round
            size="small"
            v-else
            is_followed
            @click="onFollowed"
            :loading="isFollowLoading"
          >已关注</van-button> -->

          <!-- 这步！！！ -->
          <!-- <follow-user  :autid="articles.aut_id"/> -->
          <follow-user  v-model="articles.is_followed"
           :autId="articles.aut_id"/>
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 ref是操作dom -->
        <div ref="content" @click="ImagePreview" class="article-content markdown-body" v-html="articles.content"></div>
        <van-divider>正文结束</van-divider>
        <!-- 评论的评论列表 source是接口参数里文章id或评论id-->
        <!-- 文章a    评论c -->
        <!-- <commentlist type="a"/> -->
         <!-- 展示文章的评论列表 -->
        <commentlist @click-reply="onClickReply" @on-success="total=$event" :source="this.artId" />
          <!-- 底部区域 -->
    <div class="article-bottom">
      <van-button
        class="comment-btn"
        type="default"
        round
        size="small"
        @click="isShowPostCommentPopup=true"
      >写评论</van-button>
      <van-icon
        name="comment-o"
        :badge="total"
        color="#777"
      />
      <!-- <van-icon
        color="#777"
        name="star-o"
      /> -->
      <!-- <collect-article  /> -->
      <!-- 文章收藏要通过文章的id 在这取到id后传给子组件props-->
      <collect-article v-model="articles.is_collected" :artId="articles.art_id"/>
      <van-icon
         color="#777"
        name="good-job-o"
      />
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div class="error-wrap" v-else-if="is404">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div class="error-wrap" v-else >
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button @click="loadArticleDetail" class="retry-btn">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
<van-popup v-model="isShowPostCommentPopup" position="bottom"  >
  <comment-post :list="list" @on-success="onsuccess" :target="artId"/>
</van-popup >

<van-popup  v-model="isShowReplyCommentPopup"  style="hight:100%" position="bottom">
  <!-- 评论回复 --><comment-Reply v-if="isShowReplyCommentPopup" :comment="comment" @close="isShowReplyCommentPopup=false"/>
</van-popup>
  </div>
</template>

<script>
import { getArticleDetail } from '@/api/article.js'
import { ImagePreview } from 'vant'
import { deleteUser, followUser } from '@/api/user.js'
import FollowUser from '@/components/FollowUser'
import CollectArticle from '@/components/CollectArticle'
import commentlist from '@/views/Detail/components/commentlist'
import commentPost from '@/views/Detail/components/commentPost'
import commentReply from '@/views/Detail/components/commentReply'
// import Commentlist from './components/commentlist.vue'
// import { ImagePreview } from 'vant'
export default {
  name: 'ArticleIndex',
  props: {
    artId: {
      type: String,
      required: true
    }
  },
  components: {
    FollowUser,
    CollectArticle,
    commentlist,
    commentPost,
    commentReply
    // Commentlist
  },
  data () {
    return {
      articles: {

      },
      isLoading: true,
      // is404: true,
      is404: false,
      isFollowLoading: false,
      total: '',
      isShowPostCommentPopup: false, // 下面的评论
      isShowPostReplyCommentPopup: false,
      list: [], // 存评论列表的数据,
      isShowReplyCommentPopup: false,
      comment: {}
    }
  },
  computed: {
  },
  watch: {},
  created () {
    this.loadArticleDetail()// 判断资源不存在或已删除
  },
  mounted () {},
  methods: {
    // 加载（内容加载失败）详情数据的方法
    async loadArticleDetail () {
      this.isLoading = true
      try {
        this.articles = await getArticleDetail(this.artId)
        this.isLoading = false// 控制该资源不存在或已删除
        // 操作dom
        this.$nextTick(_ => { // 操作dom
          this.ImagePreview()// 调用
          console.log(this.$refs.content)// 打印每个详情页的内容
        })
        console.log(this.articles)// 详情页的接口获取
      } catch (err) {
        if (err.response && err.response.status === 404) {
          this.is404 = true
        }
        this.isLoading = false
        console.dir(err)
      }
    },
    // 渲染文章里的图片抽离出来成组件 操作dom
    ImagePreview () {
      const contentEl = this.$refs.content
      const imgs = contentEl.querySelectorAll('img')// querySelectorAll渲染每个页面子页面中的图片
      const images = []
      // 图片点开放大预览
      imgs.forEach((item, index) => {
        images.push(item.src)
        item.onclick = function () {
          console.log('点击进去图片')
          ImagePreview({
            images,
            startPosition: index
          })
        }
      })
    },
    async  onFollowed () {
      try {
        if (this.articles.is_followed) {
          console.log('取消关注')
          await deleteUser(this.articles.aut_id)
        } else {
          console.log('关注')
          await followUser(this.articles.aut_id)
        }
        // 请求成功了
        this.articles.is_followed = !this.articles.is_followed
        this.isFollowLoading = false
      } catch (err) {

      }
    },
    onsuccess (e) {
      console.log(e)
      this.isShowPostCommentPopup = false
      this.list.unshift(e)
    },
    onClickReply (e) {
      this.isShowReplyCommentPopup = true
      console.log(e)
      this.comment = e
    }
  }
}
</script>

<style scoped lang="less">
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
